70 Series Precision Angular Contact Ball Bearings
The ultimate balance of high-speed performance and radial/axial rigidity for advanced machine tool spindles.
Introduction
Engineered for the most demanding industrial applications, the 70 Series Precision Angular Contact Ball Bearings represent the gold standard for high-performance CNC machine tool spindles.
Compared to the extra-light series, the 70 series features a more robust cross-section. This advanced design delivers the ultimate balance of ultra-high rotational speeds and superior radial/axial rigidity, ensuring exceptional stability even under heavy cutting forces.
As a direct precision bearing factory and trusted global supplier, Tedin manufactures all 70 series bearings to strict P4 (ABEC-7) and P2 (ABEC-9) tolerances. Whether you require standard 15°/25° contact angles or custom pre-matched configurations, we provide direct-from-manufacturer solutions to elevate your equipment’s performance.
15° vs 25° vs 30° vs 40° Contact Angle:
Choosing the Right 70 Series Spindle Bearing
The 70 series precision angular contact ball bearings are engineered to perfectly match the speed and load requirements of advanced CNC machining centers. Selecting the optimal contact angle is critical for balancing spindle RPM capabilities and axial rigidity.
Type C: Ultra-High Speed
Designed for ultra-high-speed spindle operations where radial loads dominate. The smaller 15° contact angle minimizes friction, ensuring maximum RPM capabilities.
Type A5 / AC: High Rigidity
Engineered for applications requiring higher axial load capacity and superior spindle rigidity, providing excellent support against axial forces.
Type A: Enhanced Axial
Offers a well-balanced profile between speed and axial stiffness. Well-suited for applications with significant combined loading.
Type B: Max Thrust
Delivers the highest axial load capacity. Optimized for applications dominated by heavy thrust forces, requiring maximum axial rigidity.
Spindle Bearing Preload:
Balancing Speed and Rigidity
Proper preload is critical for maximizing spindle performance and extending bearing life. Tedin offers three standard preload classes to perfectly match your specific machining applications, from ultra-high-speed finishing to heavy-duty roughing.
Light Preload
Minimizes internal friction and heat generation. Designed for ultra-high-speed applications with lighter cutting forces.
Medium Preload
The perfect balance. Provides excellent stiffness while maintaining capable speeds for general CNC machining centers.
Heavy Preload
Maximizes system rigidity to withstand heavy shock loads and vibration. Ideal for heavy-duty lathes and roughing operations.
Rolling Elements:
Standard Steel vs. Hybrid Ceramic
Elevate your spindle's capabilities. Tedin offers the 70 series in both traditional high-carbon chromium steel and advanced hybrid ceramic configurations to meet the exact demands of your machining environment.
Chrome Steel Balls
The industry standard for precision bearings. Provides excellent load-carrying capacity and shock resistance for general-purpose CNC machining.
- High Load Capacity: Best for heavy cutting and milling.
- Cost-Effective: Excellent performance-to-price ratio.
- Shock Resistance: Absorbs vibrations during roughing operations.
Hybrid Ceramic Balls
Engineered for extreme speeds. Ceramic balls are 60% lighter than steel, drastically reducing centrifugal force and heat generation at high RPMs.
- Ultra-High Speed: Increases maximum RPM by up to 30%.
- Low Temperature: Significantly less thermal expansion.
- Extended Life: Prevents electrical pitting and reduces grease degradation.
70 Series Dimensions & Specifications
| Designation | Dimensions (mm) | Installation Size (mm) | Basic Load Rating (kN) | Limiting Speed (r/min) | Weight (kg) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | B | da min | Da max | Db max | ra max | rb max | Cr | Cor | Grease | Oil | ||
| 7030B | 150 | 225 | 35 | 162 | 213 | 118 | 2 | 1 | 119 | 132 | 1900 | 2800 | 4.7 |
| 7032B | 160 | 240 | 38 | 172 | 228 | 233 | 2 | 1 | 143 | 166 | 1800 | 2600 | 5.75 |
| 7034 | 170 | 260 | 42 | 182 | 248 | 253 | 2 | 1 | 168 | 200 | 1700 | 2400 | 7.87 |
| 7036B | 180 | 280 | 46 | 192 | 268 | 273 | 2 | 1 | 195 | 240 | 1600 | 2200 | 10 |
| 7038B | 190 | 290 | 46 | 202 | 278 | 283 | 2 | 1 | 199 | 255 | 1600 | 2200 | 10.5 |
| 7040C | 200 | 310 | 51 | 211 | 299 | 304 | 2 | 1 | 289 | 471 | 2800 | 4600 | 14 |
| 7040AC | 200 | 310 | 51 | 211 | 299 | 304 | 2 | 1 | 273 | 447 | 2600 | 4300 | 14 |
| 7044B | 220 | 340 | 56 | 234 | 326 | 333 | 2.5 | 1 | 255 | 345 | 1300 | 1800 | 18 |
| 7048B | 240 | 360 | 56 | 254 | 346 | 353 | 2.5 | 1 | 260 | 375 | 1200 | 1700 | 19 |
| 7052C | 260 | 400 | 65 | 278 | 382 | - | 3 | 1.5 | 346 | 490 | 2201 | 3300 | 28.5 |
| 7052AC | 260 | 400 | 65 | 278 | 382 | - | 3 | 1.5 | 326 | 465 | 2101 | 3100 | 28.5 |
| 7056C | 280 | 420 | 65 | 298 | 402 | 411 | 3 | 1.5 | 351 | 550 | 1000 | 1500 | 30 |
| 7056AC | 280 | 420 | 65 | 298 | 402 | 411 | 3 | 1.5 | 319 | 500 | 900 | 1400 | 30 |
| 7056B | 280 | 420 | 65 | 298 | 402 | 411 | 3 | 1.5 | 319 | 500 | 900 | 1400 | 30 |
| 7060C | 300 | 460 | 74 | 318 | 442 | 451 | 3 | 1.5 | 423 | 695 | 950 | 1400 | 42.5 |
| 7060AC | 300 | 460 | 74 | 318 | 442 | 451 | 3 | 1.5 | 423 | 695 | 950 | 1400 | 42.5 |
| 7060B | 300 | 460 | 74 | 318 | 442 | 451 | 3 | 1.5 | 377 | 630 | 900 | 1300 | 42.5 |
| 7064AC | 320 | 480 | 74 | 338 | 462 | 471 | 3 | 1.5 | 436 | 735 | 900 | 1300 | 44.5 |
| 7064B | 320 | 480 | 74 | 338 | 462 | 471 | 3 | 1.5 | 390 | 670 | 850 | 1200 | 44.5 |
| 7068AC | 340 | 520 | 82 | 362 | 498 | 510 | 4 | 2 | 507 | 900 | 850 | 1200 | 61.5 |
| 7068B | 340 | 520 | 82 | 362 | 498 | 510 | 4 | 2 | 449 | 815 | 800 | 1100 | 61.5 |
| 7072AC | 360 | 540 | 82 | 382 | 518 | 530 | 4 | 2 | 520 | 950 | 850 | 1200 | 62.5 |
| 7072B | 360 | 540 | 82 | 382 | 518 | 530 | 4 | 2 | 462 | 850 | 800 | 1100 | 62.5 |
| 7076AC | 380 | 480 | 31 | 390 | 470 | 474 | 2 | 1 | 190 | 345 | 850 | 1200 | 13.5 |
| 7076AC | 380 | 560 | 82 | 402 | 538 | 550 | 4 | 2 | 507 | 950 | 800 | 1100 | 65.5 |
| 7076B | 380 | 560 | 82 | 402 | 538 | 550 | 4 | 2 | 468 | 880 | 750 | 1000 | 65.5 |
| 7080C | 400 | 600 | 90 | 422 | 578 | 590 | 4 | 2 | 585 | 1120 | 750 | 1000 | 85 |
| 7080AC | 400 | 600 | 90 | 422 | 578 | 590 | 4 | 2 | 605 | 1180 | 750 | 1000 | 85 |
| 7080B | 400 | 600 | 90 | 422 | 578 | 590 | 4 | 2 | 527 | 1020 | 700 | 950 | 85 |
| 7084AC | 420 | 620 | 90 | 442 | 598 | 610 | 4 | 2 | 605 | 1180 | 750 | 1000 | 88.5 |
| 7084B | 420 | 620 | 90 | 442 | 598 | 610 | 4 | 2 | 540 | 1060 | 670 | 900 | 88.5 |
| 7088AC | 440 | 650 | 94 | 468 | 622 | 636 | 5 | 2.5 | 650 | 1320 | 700 | 950 | 100 |
| 7088B | 440 | 650 | 94 | 468 | 622 | 636 | 5 | 2.5 | 572 | 1180 | 630 | 850 | 100 |
| 7092AC | 460 | 580 | 37 | 472 | 568 | 574 | 2 | 1 | 265 | 560 | 750 | 1000 | 24.5 |
| 7092B | 460 | 680 | 100 | 488 | 652 | 666 | 5 | 2.5 | 618 | 1290 | 600 | 800 | 120 |
| 7096AC | 480 | 700 | 100 | 508 | 672 | 686 | 5 | 2.5 | 702 | 1530 | 630 | 850 | 125 |
| 7096B | 480 | 700 | 100 | 508 | 672 | 686 | 5 | 2.5 | 624 | 1340 | 560 | 750 | 125 |
| 70/500AC | 500 | 720 | 100 | 528 | 692 | 706 | 5 | 2.5 | 715 | 1600 | 600 | 800 | 130 |
| 70/500B | 500 | 720 | 100 | 528 | 692 | 706 | 5 | 2.5 | 637 | 1400 | 560 | 750 | 130 |
Strict Quality Control & Manufacturing Excellence
As a direct manufacturer, Tedin guarantees that every 70 series spindle bearing meets the highest international standards. See how we turn premium raw materials into ultra-precision components.
Guaranteed P4 (ABEC-7) & P2 (ABEC-9) Precision
High-speed CNC spindles leave no room for error. That's why our 70 series angular contact ball bearings are manufactured exclusively to P5, P4 and P2 tolerance classes. This ensures minimal runout, reduced vibration, and exceptional rotational accuracy.
From advanced CNC grinding to 100% dynamic testing, our manufacturing facility is equipped to deliver direct-from-factory reliability to global machine tool builders.
Advanced Superfinishing
Raceways are superfinished to achieve a mirror-like surface, significantly reducing friction and extending fatigue life.
100% Strict Inspection
Every bearing undergoes rigorous testing for dimensional accuracy, runout, and noise levels before leaving our facility.
Cleanroom Assembly
Bearings are assembled, greased, and sealed in a strict dust-free environment to prevent any contamination.
Related Angular Contact Ball Bearing Series
Explore our comprehensive range of high-precision angular contact ball bearings, engineered for exceptional speed, rigidity, and enduring performance in demanding applications.
Frequently Asked Questions
Technical insights and selection guides for our 70 series precision angular contact ball bearings.
How do I choose the right preload (Class A, B, C) for 70 series CNC spindle bearings?
Why are P4 and P2 precision grades critical for 70 series angular contact bearings?
What is the recommended lubrication for ultra-high-speed 70 series spindle operations?
What are the advantages of DB, DF, and DT pairing in 70 series spindle assemblies?
Ready to upgrade your spindle performance?
Contact our engineering team today for a custom quote and technical support.